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Feb 15, 2020 at 16:20 comment added Richard Smith 7.62mm rounds might be more powerful (depending on if it is short round like in AK or long one for various battle rifles), but they are over twice as heavy, bulkier, require larger and much heavier guns to fire, and weight is very detrimental for anyone who has to walk any significant distance.
Feb 15, 2020 at 16:14 comment added Richard Smith And if 7.62mm rounds are so much better, why are pretty much all countries switching to 5.something mm rounds? Russia doesn't even use 7.62x39mm round AK-47 and AKMs anymore, except for reservists and such. Their primary service rifle is now various AK-74 variants, which fire a 5.45×39mm round, and they are planning to introduce the AK-12, which also fires 5.45x39mm rounds. In China, the primary service rifle is the QBZ-95, which fires a 5.8×42mm round.
Feb 15, 2020 at 16:12 comment added Richard Smith And in fights, many people who have been stabbed report barely feeling the pain at the moment, so your bolts are going to be terrible for actually stopping people who are trying to kill you.
Feb 15, 2020 at 16:11 comment added Richard Smith And while energy isn't everything and larger projectiles may be more effective at transferring their energy. However, the crossbow bolts travel so slowly that they likely act more as a knife stab than a bullet. While even a pistol round will cause massive shock and has stopping power behind it, while even small rifle rounds can cause massive internal damage and large exit wounds, a crossbow bolt does not have enough speed or energy to actually create such shock and unless you get a headshot, will pretty much only kill by causing blood loss.
Feb 15, 2020 at 16:09 comment added Richard Smith Firstly, crossbow bolts are much, much slower than rifle rounds, and have a tiny fraction of the muzzle energy. A crossbow firing a 400 grain bolt at 400fps will have under 200 joules of muzzle energy, while an M-16 has over 1600 joules and even a 9mm handgun has 400-500 joules. While the crossbow bolt might be better at piercing kevlar than the pistol because stabs tend to go through those, it will do absolutely nothing to hard ceramic or steel trauma plates.
Feb 15, 2020 at 15:52 comment added In Hoc Signo Relative to the "AR class weapons" part, the 15 rounds-per-second fire rate of an AR is unnecessary in a crossbow; the (much slower firing) AK family of weapons is much more effective at killing. The reason why the U.S. uses fast-firing guns is that Congress insists on using 5.56mm rounds, which are much less effective than the 7.62mm rounds used by AKMs. Crossbow bolts are much more powerful (more weight = more impact force = more damage/penetration) than even 7.62mm NATO rounds, so even 3 bolts/second would probably be overkill in non-suppression fire situations.
Feb 15, 2020 at 12:13 comment added infinitezero Let me show you its features! Ha ha ha
Feb 14, 2020 at 17:30 history answered Zeiss Ikon CC BY-SA 4.0